Air-filtering device for heating apparatus



Nov. 18, 1930. J, w s 2 1,782,374

AIR FILTERING DEVICE FOR HEATING APPARATUS Filed March 12. 1929 Ill ATTORNEY Patented Nov. 18, 1930 UNITED STATES PATENT oFrica JOHN A. WALLS, OF BALTIMORE, MARYLAND AIB-FILTERING DEVICE FOR HEATING APPARATUS Application filed larch 12, "1929. Serial No. 348,442.

This invention relates generally to an apparatus for circulating and heating air in a room, and refers particularly to a filterin device for use in connection therewith for straining and removing dust from the air coincident with said circulation.

The invention primarily comprehends in an apparatus for circulating and heating the air in a room, such as a radiator provided with a cover of the type set forth in my copending application, SerialNo. 256,006, and in which the cover is rovided with a cold air intake opening an a heated air outlet opening, means arranged within or framed by one of said openings for filtering the air circulated therethrough in order to remove the dust coincident with the circulation of said air.

More specifically, the invention compre- 2 hen s in an apparatus of the character set forth, an air filtering means which includes an absorbent foraminous material adapted to be continuousl moistened for obtaining a wet filtration o the dust particles from the circulated air.

As a further feature, the invention contemplates 21 filtering material of the character specified by virtue of which moisture is picked up by the circulated air to obtain a humidi- 3 fying effect and the beneficial results there'- The invention further aims to provide in an apparatus for circulating and heating air in a room, means for removably separating the filtering element therefrom whereby cleansing of the same is facilitated.

The invention aims furthermore to provide a filtering means of the character set forth 0 and for the purpose specified which is simple in construction, inexpensive to manufacture and which is highly efficient in its purpose.

With the above recited and other objects in view, reference is had to the following description and accompanying drawings, in

which there is exhibited one example or embodiment of the invention, while the claim 1 defines the actual scope of the same.

In the drawings:

Figure 1 is a transverse sectional view opening D and Figure 3 is a filtering panel with the filtering detail perspective view of the removed.

Figure 4 is a detail fragmentary sectionalv he line 4- 4 now taken approximately on t of Fi re 2, illustrating the manner in which the fi tering panel is inserted or Referrin ter or closure element E cooperates for com removed to the drawings by characters of designates a radiatorwhich' is pletely closing or regulating'the opening of the outlet D.

In order to provide means for filtering the air is heated by the radiator A, a foraminous panel 5 may be arranged to cover either or both of the openings and Preferably, the panel is arranged to'intercept the circulated air as it is heated throu h the outlet the panel is ilustrated as framed by said outlet opening. In ractice, the filtering panel 5 is preferably 0 an absorbent material and is arranged to be com stantly supplied with moisture to obtain a wet filtration effect which has been found to be more efficient than dr filtration. Obviously, in addition to the filtering of the air,

moisture is sup lied thereto for obtaining a humidif 'ng e ect and its beneficial results. s illustrated, the filtering anel. 5 is supported by a frame 6 forme at its upper end with laterally projectin su porting trunnions 7 which are designe to received by bearing grooves 8 formed in the end walls of the cover B. In order to sup ly t e moisture to the panel 5, the lower end is immersed in a container or trough 9 which is designed to hold a supply of water or other iquid substance.

In operation, it is obvious that the cold air which enters the compartment defined by the cover B is heated by the heat radiated from which circulates through the cover B and the radiator A, and said heated air is discharged through the outlet opening D. The dust laden air in passing through the interstices of the foraminous moistened material 5 will be strained and the dust particles filtered therefrom so that the heated air emitted will be practically free of dust. Obviously, within the scope of the invention, the air passing through the filtering panel will be humidified and the liquid 9 may further be employed to disinfect, scent or otherwise treat the air emitted. When it is desired to cleanse the filtering panel,-it is obvious that the same may be readily removed by opening the shutter E to the position illustrated in Figure 4 so that the trunnions may be freely removed from the bearing slots 8.

What is claimed is: In an apparatus of the character described and for the purpose set forth, a casing including front, rear and side walls, the front Wall having a cold air intake opening adjacent its lower end and a heated air outlet opening adjacent its upper end and means arrange 5 within one of said openings for filtering and treating the air circulated therethrough, said means comprising a foraminous absorbent filtering panel and a receptacle in which the lower end of the filtering panel is immersed so for absorbing a liquid contained in the receptacle, means for removably supporting the filtering panel in juxtaposition to the heated air outlet opening and the receptacle consisting of a supporting frame for the panel 3:; formed at its upper end with laterally projecting trunnions, the said side walls of the casing adjacent the upper ends of the heated air outlet opening having inwardly extend, ing grooves for receiving the trunnions and a closure element bin ed to the casing adjacent the upper end 0 the opening for intersecting the grooved portions of theside walls when the closure element is in a normal position, whereby to retain the panel frame and panel against accidental displacement.

JOHN A. WALLS. 

